After distinguishing himself by courageously neutralizing a terrorist threat, a troubled war veteran, now a sergeant of the London Metropolitan Police Service's Royalty and Specialist Protection Branch, is assigned to protect the home secretary.
Another terrorist attack raises the U.K. threat level to severe and the home secretary holds secret meetings with the director general of the security service, freezing out the police and her own minister of state for counterterrorism.
In the wake of two terrorist attacks, David is under more pressure than ever to keep the home secretary safe, but the threat to her life does nothing to curb her political ambitions.
David struggles to come to terms with the fallout from the devastating events of the past 24 hours and he is questioned by detectives.
Determined to push the investigation forward, David targets enemies of Julia, and his theories about a conspiracy at the heart of government look increasingly plausible.
David makes a major breakthrough in the investigation into the attack on the home secretary, but his inquiries put him in mortal danger.